KR950002546B1 - Coke contact material for waste water treatment - Google Patents

Abstract

The filtering system using cokes consists of (1) grinding cokes to have surface as much as 300-400 m2/m3, (2) spreading ground cokes to have space as much as 30% of the filter bed on the screen, (3) stacking the screens and flowing upward waste water.

Description

Cox contact material for sewage treatment

1 is an exemplary view of the present invention.

* Explanation of symbols for main parts of the drawings

1: Sedimentation Abnormality tank 2: Filter phase

3: contact material 4: sewage inflow pipe

5: air inlet pipe 6: purified water

7: outlet

The present invention relates to a coke contact material for sewage treatment, wherein coke, a residue remaining after combustion of bituminous coal in various sewage purification processes, is used as a contact material for microorganisms effective for sewage purification.

It is an object of the present invention to improve the purification efficiency of sewage by providing a cox contact material of the present invention instead of a contact material such as gravel which is conventionally used in treating sewage by various methods.

Conventional sewage contact materials include gravel crushed stone, honey camp tube, millet, hydrated stone, plastic pipe, sand, anthrite wood chips, activated charcoal, ratsel letter, chemical fiber, reticulated or cyclic contact material, porous Ceramic is used.

Among conventional microbial contact materials, gravel is poor in adhesion of bacteria and has a large weight. 폐) There is a problem that it is difficult to raise the height, and vegetable contact materials such as sawdust have a problem of frequent decay because of fast decay. Porous ceramics have high degree of sewage treatment efficiency, but have a high cost,

Honey Camp tube is light in weight and can increase the height of filtration, but due to the simple structure of surface area, it is insufficient to adhere to microorganisms. It is a chemical fiber used in Japanese Patent Publication No. 63-30054 and Japanese Patent Application No. 62-44798. The tangential contact material interwoven with the woven string has a limited lifetime, and there is a closed end that decreases as the weight of the uni- ness increases.

The present invention has developed a cox contact material as a result of various studies to correct the four-function incompleteness of the contact material of the bacteria in the conventional sewage treatment.

In other words, Cox burns bituminous coal and is a residue that is very light and has a very high specific gravity. It has a very large specific surface area and has good adhesion to microorganisms, which is effective for sewage purification, and decay. It can be used repeatedly, and the sewage purification ability is greatly improved.

The present invention is described in detail as follows.

Sewage Water Purification Method In the present invention, the use of gravel or scum as a conventional microbial contact material in purifying treatment according to the method of the present invention uses Cox, the residue remaining after burning bituminous coal, as a bacterium adhesion material. When using gravel or iron as a contact material, the specific surface area is only 100-200 m 2 / m 3 when the diameter of 30-70 mm is used, but the cox contact material of the present invention has a specific surface area when it is crushed to about 10-30 mm in diameter. It is about 300-600 m 2 / m 3, and the specific surface area is much larger than that of conventional gravel, so that the adhesion and purification efficiency of bacteria can be greatly improved under the same conditions.

In addition, the conventional iron or gravel is difficult to increase the height of the filter bed due to its own weight, but the Cox contact material is light and can be formed higher than the conventional one. Therefore, the sewage treatment effect by the arithmetic award method is very high.

Also, sewage sedimentation method (浸 積 In the case of treating by the method of the present invention, the coke contact material of the present invention uses granular materials such as gravel or iron, molded articles such as honey camp tubes, reticulated bodies, and porous ceramics as conventional microbial contact materials.

Conventional honeycamp tube is relatively light in weight, which can increase the height of the filter, but the surface of the structure is monotonous, and the specific surface area is not wide, so that the sewage treatment capacity is not high. It has a higher but more expensive flaw than Nikcamp.

However, the Cox contact material of the present invention is not only inexpensive because it is a residue remaining after the use of natural solid fuel bituminous coal as fuel, and is easy to handle because of its lighter porosity than any contact material. Can increase the processing power.

In addition, Cox contact materials can be reused because micropores are blocked by bacteria, removed from the filter bed, dried, boiled in dilute alkaline solution, washed with water and dried to recover the original porosity.

In addition, in the sewage treatment by the fluidized bed method, the coke contact material of the present invention uses sand, anthrite, foamed styropole, etc. as a conventional contact material.

Conventional contact materials such as sand, anthrite, foamed styropol, etc. are monotonous in structure, so the specific surface area is not so large, so that the contactability of the bacteria is insufficient. It is possible to treat a large amount of sewage more efficiently than the conventional contact material because of the ability to treat sewage.

As described above, the Cox of the present invention is inexpensive as a by-product of solid fuel, and the conventional Cox is used as a fuel for immersion of some fuels, especially carbon steel, and there is no industrial use. Cox has not only expanded the industrial utility of Cox, but also has a large specific surface area due to its porosity as a new inorganic contact material, especially in the field of sewage treatment technology. There is an effect that can be processed more efficiently.

Example

Embodiments of the present invention with reference to the accompanying drawings in detail as follows.

1 is an exemplary embodiment of the present invention, the coke contact material 3 of the present invention on a mesh bed (2) formed in a multi-stage at regular intervals in the precipitation filter tank (1) to a constant thickness to maintain a space ratio of 30% Fill. Through the sewage inlet pipe 4 installed below the sedimentation tank 1, the wastewater at 15 ° C. containing BOD 40 mg / L SS 50 mg / L was flowed at a range of 1.0-10 L / min (5-0.5 hours in terms of residence time). Feed in.

Meanwhile, the compressed air is supplied at a rate of 15-25 l / min through the air inlet pipe 5 installed in parallel with the sewage inlet pipe 4 to discharge the purified water 6 to the outlet 7 formed in the upper part of the precipitation filter tank 1. To clean up the sewage.

The coke contact material 3 of the present invention was previously passed through the wastewater of the aeration tank of the existing wastewater treatment plant for 3 days, and microorganisms contained in the sewage were contacted and attached to the coke 3 of the present invention, and the wastewater was purified as described above. .

According to the test results of the above example, when the retention time of the sewage was 2.4-3 hours, the removal rate of BOD was 95%, which is about 1.5 times compared to 58% when using a gravel medium and 62% when using iron. The removal rate is improved. The removal rate of SS is almost 100%, which is 1.5 times better than that of 70% when using gravel and 78% when using gravel.

Claims (1)

In well-known sewage treatment such as arithmetic filtration, immersion filtration, catalytic oxidation, fluidized bed, anaerobic, etc., Cox contact material for sewage treatment is characterized in that coke, a combustion residue of bituminous coal, is used as a microbial contact material for sewage treatment. .